About: http://webisa.webdatacommons.org/263448198

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	A curve approximated by the solid line in FIG. 6b may be obtained by a device such as shown in FIG. 6a with a single magnet 32f at mid stroke 50f when stroked from first end 44f through midstroke 50f and to second end 46f. Alternatively,
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com